Twisting device



E. N. DE ALCOCER El AL April 13 1926.

TWISTING DEVICE Filed August 29, 1924 mvsmons .defllcacer. .defllcacer-A'ITORNEYS Patented Apr. 13, 1926.

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Application filed August 29, 192 Serial No. 735,043.

T all to 710m it may concern:

" Be it known that we, EUenNIo N. on Ancoonr. and FRANCISCO O. onAnooonn, citizens of Mexico, and residents of Mexico City, Mexico, haveinvented a new and Improved Twisting Device, 01" which the following isa full, clear, and exact description.

This invention relates to devices for twist ing together a plurality ofcords 0r strands l of material in order to form a heavier cord or ropeand has particular reference to a device of this character which ispreferably detaehably connected with and operable by the bobbin winderof a sewing machine.

The invention furthermore includes an element which is adapted forconnection with astationary member for supporting the opposite endsofthe cords or strands to be twistedl One of the principal objects of thepresent invention is to provide an extremely simple and improvedtwisting device which functionsto uniformly twist together a pluralityof cords or strands to produce a heavier cold or rope andwhich is foundcapable of use to uniformly cover one'strand by a plurality oathelieally wound strands of material. v I

As a still further object the invention comprchends in a "twistingdevice, means for compensating for the decrease in the length v0t thestrands being twisted in o-rderto prevent breakage of the strands underthe twisting action. i

The inventionfurthermore aims to provide a twisting device ofthecharacter set forth which is" extremely simple in its construction andmode of operation, which is inexpensive to manufacture and which ishighly eflicient in its purpose. I would have it understood that mydevice could as well be used "for na-kin cord and rope out of ribhon,such as crepe paper ribbon, etc, silk ribbon, and the like. V

With. the above recited and other objects in view, the invention residesin thenovel construction set forth in the following specification,particularly pointed out in the appended claims and illustrated in theaccompanyin drawings, it being understood that the'riglit reserved toembodiments other than those actually illustrated herein, to the fullextent indicated by the general-meaning oi the terms in whichthe claimsare expressed. i i In the drawings- 1F igure 1 is a side elevation ofthe twisting device in use and as applied to a sewing machine bobbinwinder;' Figure 2 is an enlarged View with parts in section to disclosethe underlying structure;

Figure 3 is a perspective view of a slightly modified use of theinvention; 1 Figure 4 is a side elevation of the driving element whichcooperates with the bobbin winder oft-he machine; I

Figure 5 is an e nd view thereof; and Figure 6 is a top plan view or theelement for supporting the opposite end of the strands. 7

Referring to the drawings by characters of reference A designatesasew'ing machine provided with the usual bobbin winding device B whichis operated by the driving belt G of the machine and which bobbinwinding device is provided with a rotary shaft D. E represents thebaclcoi a chair or other fixed object which is spaced'l rom the machineand F the strands or cords which are to be twisted together for thepurpose o-f producing the heavier cord or rope. a

The device for effecting the twisting cornprises a drive element 10whicl'i-is providedwith a'solid head 11 atone end and with asubstantially cylindrical axially projecting sleeve 12 at its oppositeend which is slitted inwardly from its open end as at 13 to'provide amultiplicity of radially contractible spring fingers '"lhe solidend isprovided with a substantially triangular looped ele- 11191111 15 withwhich one en'dof the strands l! are associated. A, supporting elementdesiguated generally by the reference character 1b is designed tor theopposite ends of the strands and in the preferred,useo fthe device saidelement 18 des gned to hold the strands in a fixed relation while thedriving element 10 rotates the strands toefiect the intertwistingthereof. The element 16 includes a spring clip 17 having spacedresilient legs 18 and 19. The leg 19 is provided with an outwardlyoffset portion 29 which is aper-tured as at 21. A. stud bolt 21 having ar @FHQEi headed end ..-2 and a threaded end 23 is inserted through theaperture 21 wit-h a retaining nut 24 threadedly engaged thereon andlying within the offset portion 20. Ad acent its outer headed end 22 thestud bolthas mounted thereon a sleeve member 25 with which asubstantially triangular loopedelement 26 is swingingly connected. Awasher 27 is interposed between the sleeve member 25 and the outer faceof the offset portion 20 and the sleeve member 25 is clamped in place byengaging a screw driver in the kerf 28 of the head 22. In order tocompensate for the reduction in the lengthof the strands F as they aretwisted, the ends G of the strands are associated with the eye H at theouter end of a coiled contractile spring J the inner end K of whichisengaged with the triangular loop 26. It thus follows that when thespring clip 17 is engaged with a fixed object E such as the back of achair or the like and the sleeve 12 is coupled with the shaft D of thebobbin winder, that operation of the bobbin winder will effect arotationof the driving element 10 tocause the twisting of the strands F. It isofcourse obvious that as the twisting of the strands F takes place, thecoiled contractile springJ will stretch to compensate for the decreasein the length of the strands.

In some instances it has been found desirableto cover a central strandor wire L with an outer helically associated covering strip M and inthis instance the stud screw 21 as illustrated in Figure 3 is unscrewedto release the sleeve 25 from the clamping action so thatthe sleeveis'swivelled on the stud screw for rotation with the central strand orwire L as the same is rotated by theidriving element 10. The operatorafter associating the outer covering strip M with one end of theLwire Lproceeds to feed the same throughout the length of the central strand orwire L so that the outer strip is helically wound thereon.

\Ve claim: v 1. A twisting device of the character de- ..scribedcomprising a rotary thimble. like- :ClflVlllg element,means on saiddriving element for associating therewith one end-of the strands of thematerial to be twisted, said driving element being split to provide aseries of fingers for spring fitting said driving element over the endof a driving shaft. I 1

p 2. A twisting device of the character described comprising a rotarydriving element, means on said driving element for associating therewithone end of the strands of material to be twisted, and means fordetachably associating the driving element with a driving shaft,rotatable means holding the other ends of said strands, and means foroptionally locking said rotatable means against rotation.

3. The combination with a sewing machine lncludmg a bobbinwindmg driveele- 'ment of a twisting attachment including a driven element carryinga loop for receiving the ends of strands to'be twisted, a carryingtensioning element including a spring clamping member for detachableengagement with a suitable support at a distance from the sewingmachine, a tensioning means connecting said clamp and the other ends ofthe strands to be twisted.

4.. The combination with a sewing machine including a bobbin windingdrive element ofa twisting attachment including a driven elementcarrying a loop for receiving the ends of strands to be twisted, acarrying tensioning element including a spring clamping member fordetachable engagement with a suitable support at a distance from thesewing machine, atensioning means connecting said clamp and the otherends of the strands to be twisted, means for selectively preventing orpermitting rotation of the tensioning means.

7 5., In a device of the class described, means for supporting one endof a flexible device during twisting, including a spring bracketengageable with a support, a sleeve associated with the bracket, meansfor optionally locking the sleeve against rotation, a bail pivoted tothe sleeve and a tensioning spring adapted to connect the bail and oneend of the strand to be twisted.

6. Means for supporting one end of a strand during twisting, including adetachable clamping member engagable with a support, a sleeve mounted torotate 0n the exterior of said clamping member, a screw on which saidsleeve normally rotates, means for tightening the screw to hold saidsleeve against rotation, a bail carried by the sleeve and means forattaching one end of a strand to the bail. I r

7. In a device of the classdescribed, a pair. of pivoted bails betweenwhich a strand is adapted to be held during twisting, a

thimble-like driving element connected to.

one bail and adapted to frictionally fit the end of a driving shaft, arotatable sleeve carrying the other bail, means for mounting ing springadapted to connect one end of the strand with one of the bails.

9. The combination with a sewing ma chine including a rotating stubshaft of means for supporting one end of a strand to be twisted,including a. driven element frie tionally fitted over the end of thestub shaft, said supports including means for detachand a bail carriedby said element. able engagement With a rotatable driving 10.InatWi-sting deviceapairoi supports element, each of said supportsincluding 10 for attachment to opposite ends of a strand swinging bailsand a helical tensioning 5 to be twisted, one of said supports includingspring carried by one of-the bails.

means for detachable engagement with a EUGENIO N. DE ALCOGER.

stationary supporting member, the other of FRANCISCO 0. DE ALGOCER. T.

